Incidence of oesophageal abnormalities in NCA and CAD groups
| NCA (n = 61) | CAD (n = 25) | |
| Manometric abnormalities | ||
| Diffuse spasm | 10 (16%) | 03-150 |
| Nutcracker | 0 | 0 |
| Achalasia | 0 | 0 |
| Non-specific | 2 (4%) | 1 (4%) |
| Provocation testing | ||
| Acid perfusion | 20 (33%) | 5 (20%) |
| Edrophonium | 0 | NA |
| Ambulatory pH monitoring | ||
| Abnormal reflux | 21 (34%) | 5 (20%) |
| SI ⩾ 25% | 14 (23%) | 6 (24%) |
↵3-150 p < 0.03.